Desulfurizing apparatus for refractory ores.



O. A. CASE TUS FOR REFRACTORY ORES. APPLIGATIOII FILED new. 11, 1909.

DESULFUBIZING APPARA I Patented Jam. 2%; WM

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@Mvewfoz azmo WEMQ we 0 v a. A. (mss. DESULFUfiIZING APPABATUS FOR BEFEAGTOBY ORES. APPLIOATIGH FILED 001. 11; 1909.

o. A. CASE; msnnrnmzme APPARATUS FOR REFRACTORY (mas. U

APPLICATION FILED OCT. ll 1909. \1

Patented Jan. 24, 191 i 6 SHEETSSHEET 3.

c. A. CASE. DESULFURIZING APPARATUS FOR REFRACTORY ORES.

APPLICATION FILED OUT. 11, 1909. r I $82,2QS; Patented $2111.24, 1911.

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wiimoago 0. A. CASE. DESULFURIZING APPARATUS FOR REFRACTORY ORES.

APPLlGATION FILED 0CT.11.1909.

smaa TS-SHEBT G.

Patented Jan. 24, 191.1.

6 SHEE Mal .rectly after it is roaste.d.'and. to recover the CHARLES ANDERSON CASE. OF NEW YUI-LK, N. Y ASSIG'NOR, BY MESNE ASSEGNMENTS, TO ORE DESULPHURIZATION COMPANY, A CORPORATION 01? I' J'EW YORK.

DESULF'UEIZING APPARATUS FOR REFRACTORY GRES.

gggg ggfi Specification of Letters Patent. Pa -byword Jan.. 2 1, ligii,

7 Application filed October 11, 1909. Serial No. 521,372,:

A structure is shown "with a charging; platform 20 supported on the girders 21, 22, carried on columns 23, and theupper oper; ating platform 24 supportedon the girder carried on columns 26.

A charging hopper represented at 30, the npper'end or mouth of which is inst, above the platform 20, and in about the central portion thereof are located upper guides 31 and lower guides 32, which sup port the upper sliding gate 33. The latter is protected on the sides by guides and on one end by the stop 36. The sliding'n'ate 33 has pinned thereto linlrs 36 that are i T all whom it may concern; Be it known that 1, CHARLES Annnnson CAST/1 a citizen of the United States, and a resident of the borough of Manhattan, in l the county of New York and State of New York, have invented certain new and useful Improvements in Desulfurizing Apparatus for Refractory Ores. of which the following is a specification.

This invention relates to a desulfurizing apparatus for refractory ores. its object is to treat refractory ores with superheated steam and air for the purpose of bringing l about a rapid desulfurization of said Ores. 1 To imhrittle ore by sudden quenching (ll-H l l l l the shaft 38; The said shaft is fulcrumed in brackets 39 extending from the lower guides 32, and has attached thereto the first operating lever 40. The guides 82 are supported at one end upon columns &1 A second pair of upper and lower ;zuides 4-3, H respectively and stop 45 with side guides d6 are also connected with the hopper 30, and the upper end of the furnace to be desirihed. 1 pair of lower sliding gates t) and 51 are located between the guides 4-3 and ll A. shaft 52 is fulcrunied in the columns 41 and has fastened thereto pairs of arms 53, 54%. The end of the arms 53 are pinned to links metals from fumes generated in. the furnace of the apparatus.

A further objectis t9 provide appurtenances for the continuous discharge of the gaugue and reduced metals, and the return to the furnace of any unconsunied gases that have passed through the apparatus to aid the dcsulfurization of-said ores.

lu the accompanying drawings which exemplify the invention, Figure 1 shows an elevation of the invention Fig. 2 represents 1 a plan view of Fig. 1. Fig. 3 is an enlarged a section of a portion of Fig. 2 on the line 3, 25, g

Fig. slshows a partial left hand side view L 55 that are in turn pinned to the sliding of l 1, Fig. 5 represents a partial scclior gate 50. Links 56 are connected to the arms El and the sliding gate 51. A second. operating lever 57 is fastened to the shaft The otlicc of the sliding gates 33, 50 and 51, is to charge the furnace with ore to he treao ed, by first opening and closing the upper I it on the line 5, 5, Fig. (3 is a sections-l on the line (3, (3, Fig. T shows an i eularp wc portion of Fig. 4:. Fig. 8 represents an enlarged axial vertical section of one of' the twyers with its support. Fig. 5,) i a partial righthand end view of Fig. 8, gig. ll) shows an horizontal axial section of a tow;- ers with its support, Fig. 11 is a section of Fig. 8 on the line 1], 11 and Fig. is a partial enlarged section of Fig. 8 on the line l2, l2.

The principal elements of the invention will be first describe l. after which the said elements and their functions will be considered in detail.

The twyers described herein as well as the steps of the process to desulfurize the ores and treat the fumes generated are claimed means of the levers and 57. The. centril opening between the ends of the sliding gates and 51 deposits thecharge of ore into the 'centralpo'rtion of the Water jacketed inclosed furnace 60; The charging hopper 30 connects with the inclosed head 61 of the furnace and said head has formed therewith openings for the nipples 63,' that connect with the fume piping 64: that surrounds said head 61. l a

The furnace has fitted thereto the water in separate accompanying applications. jacketed twyer supports 68. 'Water. piping namel an application for a twyer filed ()ct. l (39 leads into the latter and Water outlet pipllth, 1909, Serial N0. 521,973, and an application for a process for reducin; and desulfurizing refractory ores, tiled ()ct. 11th. 2 of said supports With'tl e 190th Serial No. 521,974. l the furnace.

lug extends from the furnace 60, While turn pinned to levers Slentending from sliding gates 33 and then opening and closing the lower sliding gates 50 and 51 by.

pipe connections 71 count t the Water jackets water gaclcets of Each water gacketedtwyer lot) I nlent ot' the threaded end 02 with a corre- 1 in the threaded end 0? o'l the ring 01. A

support 68 has a circular threaded opening 72 at one side, and water conduits 73 connect the upper and lower portioi'is of the opposite sides thereof. The said conduits constitute water jacl-ieteil protecting bars for the said twyer supports.

The lower end of the furnace is supported on a frame 76 which has connected up therewith the inclined stationary separating and l discharging chutes 77. and the adjustable l chutes 78, which latter are inclined to ditt'erent positions by means of the screw rods 70. Framing supports the frame 71') and also the cooling hopper 86 having the inlet piping 87 and outlet piping The chutes 77 1 and 78 lead charges of gangue and metal to the said cooling hopp r 5 3. i

In each threaded opening 72 of the tw ver supports 68 is secured the outer barre 1a) f j the twyer which at its outer end carries the ring 91. The latter has formed therewith the threaded ends 92. 115 otthe same internal diamete and an ii'nvardly extending tlange 91. An inner annular port. 115 is formed with said ring. The engagement of the'luirrel 9t) and ring 91 is'made secure bythe engagesponding thread on the said barrel 90. A con'ibustion chamber 96 within the barrel 00 has one end supported on the flange 04-. An igniting barrel 97 with the tapering sleeve 98 ot'tireclay and the like supported funnel cap 101 is connected to the outer end of the sleeve and has extending from the lower portiorrthereot' the bracket 102. The latter supports a fuel chamber 103 threaded on its outlet fbr the adjustable damper 101. that can be located in different u'irtions of the outer surface of said fuel chamber 103.. to'control the volume of air drawn into the the outer'surface of said fuel. chamber 10 with the valve is connected tothe fuel chamber 103. A burner with the chamj bel's 111 and 112. has connected thereto the needle valve 113 having the handle 11 1'. An outer nozzle 115 extends from the cham her 111, anda concentric inner nozzle 110 extends from the chamber 112. The said nozzles both extend into the fuel chamber 103. Steam' iiping with the valve 121 connects with the sa d chamber 111. and oil piping 122 having the valve 123 connects with the chamber 1.12.

311521111 piping with th valve. 131 is connected with the upper portion ofthe ring 91 of the barrel J0 to lead steam to the annular port. 05 and from thence to the annular superheating ehan'ibe1h1f32. Drain piping 13 with the valve 134: connected with the lower end of said port 97 Drain piping 135 extends from the lower end of the barrel 90 and is connected with the valve 134- by means of the piping 13G.

ld itl'i the framing R5 are fitted pairs of horizontal top girders 1-10 and interim-diatc horizontal girders 111. carryjournal brackets 142 and 1 13. A drum shaft M1 carrying the discharging drum 1.15 and spur gear 1,4 0. is journalcd in the brackets 112. A. drum shaft [-17 carrying the discharging drum .148 located in the hopper 86. is journaled in b 'ackets 143. A spur gear 149 with the. teeth thercot meshing with the spurgear 14-10 is fastenedto one end of the shaft 117 and a spur gear 150 is'secured to the other end of said shaft 144.

Conveyor boxes 151 and on opposite sides of the framing 85 are connected by the lower horizontal inclosed runway 1.37. From the upper end of the conveyer box 151 extends the upper incloscd runway, with the horizontal portion 158 having the opening 110 and the inclined portion 1130. The opening 1.31,) conne ts the runway 158 with the hoppert-lfl. The upper end of th'e'said inclined portion 1130 is supported on a frame with the column 161 and which supports a discharging chute 102.

A journal bracket extends from the horizontal portions 158 of the upper runwayJaud a journal bracket with the members 171 and 172 is secured to the top of the said horizontal portion 158. A journal bracket 173 is located in the same axial cen ter line with the bracket 170 and the said member 171. A shatt174 is journaled in the bracket 170, member 171 and the bracket 17%. The said shaft carries the driving pu'lle v 175. pinion 176 and bevel gear 177. A shaft 178 is journaled in the member 172 and in a journal bracket 179 connected to. the horizontal portion 1:38 of the upper runway. The shaft 178 carries a bevel gear 180 the teeth of which mesh with the teeth of the bcvcl gear 177. and a pinion 182 on said 'shal't gears with the spur gear 150. A journal bracket 1S3 islocated on one side of the conveyor box 151. and a journal bracket 181 1 is located on the opposite side thereof.

The girders- Mr driving shat t 185 extending through th'c conveyer box 151 is journaled in the brackets 18. 184 and carries Within said box the driving sprocket chain wheel 1%. A spur gear 187 on the shaft 185 gears with the pinion 176.

A sprocl-ret chain wheel 192 is secured to a s1 aft 103, journaled in brackets not: shown in the. sides of the conveyer box 152. Framing extending from the columns 101 support journal brackets like 194 for the shaft 195, on which latter is supported the sprocket chain wheel 196. A conveyor comprising the conveyer chain 197 and plates 198 is engaged byv the said sprocket chain'wheels, and. extends through the conveyor boxes 151 & 1."- as well as through the runways 157 and 158.

A battle box 200 is connected to the tame piping 04 by means of the nipple 201.

Water jackets 203 are formed with the sides of said box and are connected by the pipes Inclined battle plates 205 extend from the root of said box to within a short disthe bottonn and battle plates 205 g with the plates extend from bottom of said box to within a short ditence of the roof thereof. lnlet piping .219 is connected with one of the jackets of the said box 200. and outlet piping 211 extends from the other water jacket thereof. Hopper outlets with the pipesQlil and valves E214- ex'tend from the bottom of said battle box.

A spray tank 215 having a hand hole with hand plate 208, is connected at its upper portion with the battle box 200. A Safety valve Qlt'rcovers a port in the bonnet 217 of the tank 215, and spray piping with the downwardly extending nozzles 219 is located in the top end of said tank. The safety valve will rise when the iredetermined pressure of the fumes to be escribed is exceeded, and the spray from the nozzles 219 percolates through the fumes in said spray tank. A second spiny tank 223 with a hand held having the hand hole plate is located adjacent to the tank 215 and con nested thereto by the piping Spray piping 225 has extending therefrom the nozzles 228 which point upwardly and enter the tank 223 below the level of the piping 22%. From the bonnet 227 of the tank 223 exthe upper portion of the fume piping The fumes in their downward travel in the tank 215 are cooled, by the spray of water discharged from the nozzles "'9 in said tank. The t'umes leave the tank .215 and enter the tank 223 by way of the piping 224. The spray from the nozzles 220 in the latter tank cool the fumes in their upward travel. The. tome pipin 228 has connectod thereto the horizontal branches 222), 230 which are fitted respectively with the valves 231 and 2".2. 'llunbrunch 22% leads into the zinc box 235 and the branch 2230 leads into the Zinc box zoo. Both of said boxes are of the same construction. pref; erably made of wood and can he used together or one at time. Each of the. zinc ,boxes contains the balilc plates .23? extending from the root thereof to within a small distance. from the bottom of the said boxes. Flanges 2355 are formed with the bottom ends of'said battle plates 23?. Ballle plates 22%) extend upwardly from the bottom of each zinc box to within a short distance oi other battle plates in the box.

the root thereof. and are-located between the Flanges 240 extend from the low r portions of the baflie plates 239 and are. on the same level with the flanges ll' ire Screens 2-H are supported on the flanges 238 and 240 and with the battle plate-s constitute chambers for zinc shavings 24:2.-

spray tanks 215. 223 andhas titted therewith the valves 2-H; and 247. Piping 350 is CUllllQClt-Kl with the piping 245 and has extending; therefrom the branch pipes 251 each fitted with a check valve 252. that connect with the. zinc box 235 at the bottom thereof. llranch pipes 255 having the check valves 25h extend from the pipe 250 and connect with the zinc box 236 at the bottom thereof. The valves 2% and 24 7 allow the water to be drained from either or both of the tanks 215 and 22 and the piping 250 with its branches allows the drainage of the water from the zinc boxes 23.; and 236. Fume, piping ".260 with the valves it'll and 26:2 con nect the said. zinc boxes with the exhauster 263. The ofiice of the valves 261 and 262 is to permit the withdrawal of fumes from either of the zinc boxes to the sump tank 2M. which latter is connected with said exhauster by the pipe 265. -The piping 250 also leads to the sump tank 264 on a. level below the pipe 265, to lead the water from the zinc boxes and spray tanks. I The water carried with the fumes that enter the sump troduced therein through the piping 250. A water glass 266 on the sump tank 264; indicates the level of the water therein. A drain pipe 267 with the valve 268 is connected with the lower portion of said sump tank. V'ater discharge piping 2G9 leads from the sump tank 264 on a level between the piping 265 and 250.

A pair Oil, preferably wooden zinc shaving boxes "270 and 271, similar to the boxes 235 and 236 and having the zinc shavings 278 are connected'by branch pipes 274, having respectively the valves 27 .3 and 217. The said branch pipes connect with the piping 26f). Discharge piping extends from the lower portion of the zinc box 270. and discharge piping 281 extends from the lower portion of the zinc'box 271.

Fume piping 985 extends from the top of the sump tank 264, to lead the fumes to a box 286, preferably madeof wood and filled with iron shavings 287. A. steam coil 288 in the box 286 dries the fumes therein. Fume piping 289 with the stop valve 290 and check valve 291, leads from the box 286 and connects with the bottom of the oil tank .294 having the gage glass 295 and hand hole with the hand hole plate 292. A pipe 296 connected with the piping 289 extends into the said tank 294, to within a short distance of the upper end thereof. The tank has a bonnet 297 to which is fastened a barrel 298.. thatextends to about the middle ortion of the'ta-nk and incloses a portion 0 the-pipe tank. collects and mixes with the water in- 230; surrounds the spindle 300 and h ars lietween said valve 29!! and the upper end of t the. f 'ame 2301. A fume diseharge pipe 3013 extends t'ro'm the honnet 297 and surrounds j the appurtenant-es of said valve 2%.

'From the upper portion of the tank 294 extends the fuel gas piping Zita), with the stop valve 3t)? and eheelt" valve 308. The

piping Z3013 eonneets with the fuel gas inlet piping 105 of the twyers having the outer barrels 9t). ()il piping llt) with the stop valve illl extends from the lower portion of the oil tank 2H4. and has eonneeted thereto the pump 312 driven hy the motor 313. The piping Zllt) eonneets with the oil piping 122 of eaeh of the burners 110 of the tw vers.

"lo operate the invention 'ret'raetorv sultid i ores are eharged into the upper end of the ehargmg hopper it and l means ot the upper sliding gate 333 the eharge is deposited on the lower sliding gates Jttand 51. The latter h means of the operating lever 5?. allow the eharges of ore to deseeialmto the eentral portion ot' the 'l'urnz'u-e tttlt and pile 1 up from the ehutes TT and TR above the level ot the tw vers. Next the exhau-ter 263 is start d. Then a pieee ol' oitl v waste is plaeed within the tapering sleeve as. and the operathat ol eaeh tw ver heing the same. the operation of one olll will he explained. valve i2 3 ol' the oil piping 12'. i opened as well as the valve 121 of the steam piping 120.- The motor 23 ll rotating. oil is t'oreed l lrom the oil tank 294 through the piping;

' reaetlon is 310, the valve I311 lieing open. and through the-oil piping lJQ oi" the twver. The said oil tlows'th'rough the inn r nozzle llt' of the hurner llt). its volume heing eontrolled h The oil at'ter leaving I the needle val\e 1123. the tuner nozzle passes through the. tip end ol the outer nozzle H5. and from thenee through the luel ehamher I03. and tinallv into the tapering sleeve 9H. "\s the oil leavethe inner.nozzle till it mixes with and is vaporized Irv the steam whieh enters h v wa v rt the piping 120 and the outer nozzle 115. The vaporized oil and steanris ignited in said tapering sleeve 95 and then passes into the eomhustion ehamher 9t; on its wa v through the twyer support (38 to enter the t'urnaee. 'hile the eharge ot' vaporized oil is hnrning in the eomhustion ehamher 9t steam is admitted to the annular superheatin; ehamher 12-32. by way of the piping tilt), superheating the steam in said ehamher. 'hen the charge enters the t\v ver support (38 it meets and mixes with said super-he'attal steam.

drawn into the said tw vers through'the funnel eaps It)! to' support the kromhustlon ot the t'ltarg'e the voliunes of air being regu- VVhile the eharge of steam and? vaporized oil is entering eaeh twver air 1s 1 tween (300 -900 (7) lated l v thodampers 104. The aetion of the the desult'urization ol the same. The endothermie reaetion of the steam on the sultids ahsorhs heat andtherehy prevents the fusion E of the ore. During the desulfurization, a

part. of the metals or metal, volatilizrand pass as fume from the furnace, as the result ot the low volatlhzatlon temperature of some of their eompounds; the free metals and their manpouncls, which have a high volatilization temperature, ren'iain in the turnaee withthe gangue of the ore.

'l'he reaetions which occur in .the furnaee with the superheated steam and oil when 0' there is ample air supply for eondueting roasting, may be rem'esented as follows:

It the steam supply is cut ott', then the oil is eonsnmed with the production 01 wery lugh temperature aeeordmg to the-equation:

The etl'eet of the superheated steam is the prevention of ver v high tempe 'ature as the result of its endothermie r 'aetion, that is the ahsorption of heat in order to hring about reaetion. \\'i1lt the sullids of the-ore. removing sulfur :u-eording to the equation. I

The superheated steam also reaets The aho-ve reaetion oeeurs when noair is present: hut when air is present. as in the ease when roasting an ore m the furnace the (o) 2 1 3FeU-t-5 up aso ture at whieh the furnaee is operated (be- 'lhese minerals in the ease of gold and silver are the tellurids and 1 selenids espeeiallv. Some of the more commonlv oeeurrimeof these are: white tellu-' rium'. petzite, s vlvanite; nagyagite. and hes- .site, other minerals from which silver is volatilized at a toinparativelv low temperze ture are freieslehenite, polyhasite stephanite, pyrargyrite and proustite';

li hile the furnace is being charged with ores the discharging drums l4?) and I l-Share rotated in opposite directions toeach other, by the rotations of the shaft 1H and the interposed gearing, the screw rods regulating the openings between the chutes T7 and 78 to control the discharge from the furnace into the cooling hopper 86. (then the heated ore drops into said cooling hop per it is disintegrated, and any tree metal in the ore passes with in into the hopperand an be easily separated from the gangue. The said gangue with its free metal enters, the opening 159 of the conveyer runway having the horizontal portion 158, and by means of the conveyor with the chain 197 and plates 198 is carried to the discharging chute 162 from which it is taken away.

The fumes are drawn up in the Furnace by virtue of the action of the exhauster and the intervening pipe connections. the twyers have started operations, I m of the steam piping '120 and the and after a portion of the ore v isulturixed, both may he shut off twyers operated by means of fuel 3 d in the oil tank 2 4. and also thlo gases geneiatcd in the turnace atter tl'icy have made a cycle ol their operations and have returned to the furnace. While the furnace is in operation the discharging drums 1-H) and 1% are rotated at a. speed to accuratelydiscluirge-thc gaugue and free metal produced. After the fumes are have made a cycle of their operations and have returned to the furnace. While the furnace is in operation the discharging drums $5 and lifts are rotated at a speed to accurately discharge the gangue and tree metal produced. Attcr the fumes are drawn up the. iurnacc (to. th y first enter the tome piginc' (3t and from thence into the battle lWK 200. where the dust is, separated tlicrctron'i by striking" the halite plates 205. lhc said dust enters the halllcr outlets 212, escapes by way of the pipes 213, and contains the heavier particles of the metals which were visatilized in the turnaee. The fumes are somewhat cooled in the said haiilc hox. The 't'uincs next enter the spray tank 215 at theupper end thereof and are ntet tuerein hy the sprays of water issuing from the nozzles 1219. The waterchitls and separates a portion of the metals from the fumes which have escaped from thc hatll hox Q00 and said separated metals drop to the hottom ot the tank with the water. The fumes next enter the second spray tank 223. by way of the piping 224, Where they are met by the spray of water issuing" from the nozzles 224', when they arc again cooled and a further separation of the volatilized metals therein takes place,

which metals drop to the bottom of said second tank with the water therein. The metals in the tanks after the operations are finished are removed through the openings of the hand pole plates 20S and In case excessive pressure is obtained in the spray tanks it is relieved by means of the safety valve 2H3. The fumes carry some $0 and into the spray tank and wherein by their combination with water form H 80 and H SO Some of the volatile minerals drawn into the spray tank are dissolyecl in the said H 50 and H 30 leave the spray tank 223 by way of the fume piping 228 and enter the zinc box 235 or 236, by keeping the valve 231 open and the valve 232 closed or vice versa. The zinc shavings 242 in the zinc hoxes cause a further separation of the metals from the fumes by chemical precipitation.

The chemical precipitation of the metals in the zinc boxes can he represented by the following equations:

in which. the symbol M designates nietat in combination with the SO and SO After the cou'ipletion of the process the Zinc sl'iavions with the said metals ar'e, removed and separated, after which. fresh Zinc shavings are placed in the Zinc boxes. The water carried over with the fumes is discharged through the branch pipesiol and 33.3 ft m which it enters the piping 250 and. which latter is also connected with the spray tanks 21.) and The fumes next are drawn into the exhauster 263 and from thence discharged into the sump tank it'd, the piping 250 leading: the water into the lower portion. of said sump tank. \Yatcr ,is separated from the t'uuu-s in the sump tank by gravitation and any metal mixed therewith are led with said water hy means of the piping 268 into either one of the zinc boxes 270 or 271, in which Zinc shavings 278 separate the metals from the water towing therethrough.

The zinc shavings in the latter Zinc boxes are removed after the process and the metals separated therefrom. The. water is discharged from the zinc homes 270 and 271 by means of the discharge piping 280 and 281.

The fumes are discharged from the sump tank through the tunic piping 285, and enter the hox 286 having the iron shavings 287. .The reactions of the iron shavings on the 'fmncs may he represented by the equations MFiO -kl lVI-I-ldeFK) MSU H e:hI-l-FeSU in which M designates the metals in cornhination with the $0 and 30 Aft r the process the metals are easily separated from The fumes and are deposited therein by filtration and the FOS04 and FeSO The fumes next cuter the oil tank 29% by way of the piping 285) and pipe 296. As the fumes leave the pipe 2% they come in contact with the oil 'in said tank and vaporize some of said oil.

The vaporized oil is used as fuel gas for the twyers. Metals carried with the fumes into the oil tank are filtered by the oil therein, and deposited on tl J bottom of said tank, from which they are removed through the opening having the hand hole plate 292. The fumes and fuel gas leave the oil tank 29% by way of the piping 306, after which they enter the fuel gas inlet piping 1'35. The latter leads them to the fuel chamber 103 and from which they enter the twyers, If 'sutlicient fuel gas enters the piping 105, tosuperheat the steam entering the twyers by way of the piping 130, the supply of steam and oil by the piping 120 and 122 is shut oil.

Having described my invention what I desire to secure by Letters Patent and claim is:

l. In an apparatus the combination of a furnace, means to furnish superheated steam, air and gaseous fuel for the dcsulturization of a charge of ore in said furnace, and means to disintegrate the gangue of said ore.

In an apparatus the combination of a furnace, means to furnish superheated steam,

air and gaseous flltl for a charge of ore in said furnace to desulfurize the same, and a cooling tank connected with said furnace o disintegrate theganguc of said ore.

3. In anapparatus the combination of a furnace, means to furnish superheated steam, air and gaseous fuel for ore in said furnace to desult'urize the same, a cooling tank connected with s id furnace, means connected up between the furnace and cooling tank to adjustably (.lischarge the lesulfurizcd ore from the furnace into said cooling tank.

4. In an apparatus the combination of a furnace, means to furnish steam, air and oil fuel for ore in said turnacc 'to desulturize the same, zuljustahle chutes connected with the furnace to discharge the dcsult'urizcd ore thcrct'rom. discharging drums below the chutes and a cool- .ine tank below said chutes.

n. In an apparatus of the character dcscrihcd, the continuation of a charging hooper for said Furnace, sliding gates in the said hopper to charge r 2 into the central portion of the furnace. twycr connected with said furnace to Furnish oil. steam and air therein to dcsult'urizc the ore. an inclined stationar separating and discharging chute at thc lower end of the furnacc. an adjustable swinging chutc coat-ting tank below the furnace, a rotary discharging drum hclow chutes to automatically discharge the ore from the furnace into said tank, and means to carry the ore from the tank.

superheated lurnacc. a i

(3. In an apparatus of the character de- -in chutes co.- cting with said stationary t'llllttm a L'nOliHg tank below the furnace, rotary discharging drums below the chutes to discharge the heated ore from said furnace into said tank, and aconveyer to carry away the ore from said tank.

.7. In an apparatus of thecha-racter described, the combination of an inclosed furiace, means to furnish superheated steam, air and gaseous fuel for ore in said furnace, means to discharge the ore that has been treated from thefurnace, a spray tank connected with said furnace, and means to draw fumes from the furnace into said spray tank.

S. In an apparatus of the character described the combination ofan ipclosed furnace. means to furnish superheated steam,-

air and gaseous fuel for ore in said furnace, and means to discharge the ore that has been treated from the furnace, and means to draw fumes from the furnace and through the spray tank.

In an apparatus of the character de-.

scribed the combination ofan inclosed furnace. means to furnish superheated steam, air and oil fuel for ore in said furnace, means to discharge the ore that has been treated from the furnace, a sprayta11k,fume piping connecting the latter with the furnace. a zinc box. fume piping connecting the spray tank and the zinc box and an exhauster and fume piping connecting the exhauster with the zinc box.

it). In an apparatus of the character dcscrihcd thc combination of an incloscd furnace. a twycr connected with the furnace, a spraytank. fume piping connecting the latter with the furnace. a zinc box, fume piping mam-na the latter with the spray tank. an cxlnu stei', fume piping connecting the cxhaustcr with the Zinc box. means to drain the spray tank and the zinc box, an oil tank, fume piping connecting the oil tank with the discl'iargc end of the exhauster,

piping munccting the upper end of the oil tank with said twyer to supply fuel gas 5 llltt".l'). and piping connecting the lower end ot' the oil tank and twyer to supply oil with inc said stationary hute. a cooling? to the la tcr.

It. In an apparatus of the character described the combination of an inclosed furnace, a twycr connected with the furnace, a spray tank. fume piping connecting the upper end of the furnace with the spray too tank, a zinc box, fume piping connecting the upper end of the spray tank and the zinc box. an exhauster, fume piping connecting the exhanster with the zinc box, a sump tank connected with the discharge end of the ,exhauster, a box with iron shavings, .t'uiue piping connecting the latter hox with the sump tank. fume piping extending from the said hex. an oil tank connected to the hdterpiping. piping for fuel gas leading from the oil tank to the twyer and piping for oil connecting the oil tank and said twyer.

1-2. In an apparatus of the character described the eon'ihination of a turnare,a water jacketed t-Wyer support for the furnace, a

watervjacketed protecting bar in said support. and a twyer for the twyer support.

1 3. In an apparatus of the character described the combination of a furnace, a Water jacketed twyer support for the furnace, water jacketed protecting bars in said support, a twyer for the support and a burner connected up with the twyer.

Signed at the borough of'Manhattan in the county of New York and State of New York this 9th day of October A. D. 1909.

CHARLES ANDERSON CASE.

\Vitnesses BET DE BONNEVILLE, MAn'riX ZDIAXSKT. 

